1. Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CeNIDE); University Duisburg-Essen; Universitätsstrasse 15 Essen 45141 Germany
2. Nanoparticle Process Technology; Faculty of Engineering and Center for Nanointegration Duisburg-Essen (CeNIDE); University Duisburg-Essen; Lotharstrasse 1 Duisburg 47057 Germany